Hospitality-CI-v4 EQc7: Daylight 1-3 points

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Intent

Requirements

Option 1. Simulation: Spatial Daylight Autonomy (2–3 points)

Table 1. Points for daylit floor area: Spatial daylight autonomy

Option 2. Simulation: Illuminance Calculations (1–2 points)

Table 2. Points for daylit floor area: Illuminance calculation

• Use typical meteorological year data, or an equivalent, for the nearest available weather station.
• Select one day within 15 days of September 21 and one day within 15 days of March 21 that represent the clearest sky condition.
• Use the average of the hourly value for the two selected days.
Exclude blinds or shades from the model. Include any permanent interior obstructions and movable furniture and partitions.

Option 3. Measurement (2-3 points, 1-2 points Healthcare)

Achieve illuminance levels between 300 lux and 3,000 lux for the floor area indicated in Table 3.

Table 3. Points for daylit floor area: Measurement

NC, CS, Schools, Retail, Data Centers, Warehouses & Distribution Centers, Hospitality, CI		Healthcare
Percentage of regularly occupied floor area	Points	Percentage of perimeter floor area	Points
75	2	75	1
90	3	90	2

With furniture, fixtures, and equipment in place, measure illuminance levels as follows:
• Measure at appropriate work plane height during any hour between 9 a.m. and 3 p.m.
• Take one measurement in any regularly occupied month, and take a second as indicated in Table 4.
• For spaces larger than 150 square feet (14 square meters), take measurements on a maximum 10 foot (3 meter) square grid.
• For spaces 150 square feet (14 square meters) or smaller, take measurements on a maximum 3 foot (900 millimeters) square grid.

Table 4. Timing of measurements for illuminance

If first measurement is taken in …	take second measurement in …
January	May-September
February	June-October
March	June-July, November-December
April	August-December
May	September-January
June	October-February
July	November-March
August	December-April
September	December-January, May-June
October	February-June
November	March-July
December	April-August

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